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[" 4.A hollow charged metal sphere has r...

[" 4.A hollow charged metal sphere has radius "r" .If the "],[" potential difference between its surface and a point at a "],[" distance "3r" from the centre is "V" ,then electric field "],[" intensity at a distance "3r" is "],[[" (a) "(V)/(2r)," (b) "(V)/(3r)],[" (c) "(V)/(6r)," (d) "(V)/(4r)]]

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